05 YUKON REAR HEAT NOT WORKING The rear heat blows cold air. Yesterday morning it felt like the a/c was on in the back. At lunch time I got in the back seat and turned it on from the back and adjusted
...05' Yukon is not working....it does work in the front. What could the problem be? Possible blend door motor (controls amount of heat that comes out). Or heater core in back is clogged, or air bubble. ...
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